Valve



A. P. BRUSH.

VALVE.

APPLICATION FILED FEB. I6, I918.

1,354,01 9. PatentedSept; 28,1920.

s? V II I I i I 75 f 73 72 f J 72 l I I I .flIn 6 7260 7. 7/44 WW4 ALANSON P. BRIJ'SH, OF DETROIT, MICHIGAN.

VALVE.

Specification of Letters Patent.

Patented Sept. 28, 1920.

Application filed February 16, 1918. Serial No. 217,651.

To'all whom it may concern:

Be it known that I, 'ALANSON P. BRUSH, a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented a certain new and useful Improvement in Valves, of which the following is a full, clear, and exact description.

This invention relates to valves adapted particularly for internal combustion engines, andespecially to exhaust valves of the puppet type.

The object of the invention is to construct the valve so that it conducts away heat from the valve proper at a more rapid rate'than do valves of ordinary construction so as to prevent the valve being excessively heated.

The heating of the exhaust valve of an internal combustion engine presents a difficulty which designers of internal combustion engines have not been able to entirely obviate even though the head of the engine, or that part through which the valve operates, is jacketed to the greatest possible extent.

It is the aim of the present invention to materially increase the heat conductivity of the valve, including its stem. I accomplish this by using in the valve metals of different heat conductivities, one having the necessary wear resisting qualities, and the other relatively great heat conductivity. I prefer to provide the core or central part of a material, such as copper, having good heat conductivity, and the outer part or shell of relatively hard material, such as steel, and preferably the core at the. valve proper is expanded or otherwise formed so as to completely cover the inner side of the valve proper when the latter is seated.

My invention may be further briefly summarized as consisting in certain novel details of construction and combinations and arrangements of parts which will be described in the specification and set forth in the appended claims.

In the' accompanying sheet of drawings, the figure is a vertical sectional view through the upper part of an engine cylinder and through the head, showing my improved exhaust valve, the valve being shown partly in section and partly in side elevation.

In the drawing, 10 represents the cylinder, and 11 the head provided with an exhaust port 12, which communicates with an exhaust manifold (not shown). An inlet manifold is shown at 13, and water cooling passageways at 14. The exhaust valve 15 is closed by a spring 16, and may be opened by any suitable mechanism or device, such as shown at 17. The particular construction here shown of the engine head, and in fact, of any part of the engine aside from the valve is not material to my invention, as it may be otherwise constructed, but I have shown the part of the engine with which the exhaust valve functions to make clear the utility of the heat conducting core.

As shown in the drawing, the valve consists of the stem. and valve proper, the latter being'formed by expanding the stem at one end. This valve consists of an outer shell 15 of hard, wear resisting material such as steel, and a core 15", of good heat conductin material such as copper. The shell 15 pre erably extends throughout the length of. the stem, and at its lower end is expanded so as to form the part which engages the valve seat 12, itslower end, the expanded portions of the shell and core forming the valve proper, which is designated 15. It will be observed that the expanded end of the core completely covers all of the expanded part of the shell, so that when the valve is seated, the shell, and in fact, the entire inner side of the valve proper, is completely covered and protected by the expanded part of the Thus the eat engaging part of the valve is protected against the intense heat of ignition, and the good heat conducting property of the core carries the heat upwardly along the stem, or away from the part which is most highly heated,-that is, it is conducted away from the valve proper towardthe upper end of the stem where the heat can be dissipated. Obviously, therefore, this valve has great utility in engines of high speed and heavy duty in which heretofore the heating of the exhaust valves has been a limiting factor in speed and performance, because for a given weight of valve, the valve constructed in accordance with this invention will run much cooler than the valve of ordinary construction.

While I have shown the preferred form of the invention, I do not wish to be confined to the same, as certain changes can be made without departing from the spirit of the 1nvention or materlally affecting the achieved results.

and the core also is expanded at- Having described my invention, I claim: 1. A valve adapted particularly for internal combustion engines comprising a stem I with an enlarged portion serving as a head, and having relatively high heat conducting material covering the inner face of the head and extending along the valve stem. x

2. A valve adapted particularly for internal combustion engines comprising a head and a stem and having a shell of hard, wear resisting material and a core of a material having relatively high heat conductivity, said core being exposed on. the inner face of the head and extending through the stem.

3. A valve adapted particularly for internal combustion engines comprising a stem and a valve proper, the inner face of the valve bein covered with protecting material of re atively high heat conductivity which material extends through the stem.

4. A valve adapted particularly for an internal combustion engine comprising a stem and a valve proper, the latter having a portion adapted to engage a valve seat and its high heat conducting material which extends through the stem.

5. A valve adapted particularly for internal combustion engines comprising a stem and a valve proper, the stem having a shell of hard, Wear resisting material, and a core of material having relatively high heat conductivity, the core at the valve proper covering one face of the latter.

' 6. A valve adapted particularly for internal combustion engines comprising a stem having a shell of hard, wear resisting material and a core of a different material having a relatively high heat conductivity, the core and shell being expanded at one end so as to form the valve proper, the expanded part of the core covering the face of the valve which is exposed to the heat of ignition when the valve is seated.

i In testimony whereof, I hereunto aflix my signature.

'iiuso'ifr. BRUSH. 

